Thermal measuring and testing – Temperature measurement – In spaced noncontact relationship to specimen
Reexamination Certificate
2005-03-01
2005-03-01
Fulton, Christopher W. (Department: 2859)
Thermal measuring and testing
Temperature measurement
In spaced noncontact relationship to specimen
C374S121000, C374S161000
Reexamination Certificate
active
06860634
ABSTRACT:
A method of temperature measurement for measuring a temperature of an object to be measured that is heated by a heating source in a multiplex-reflection environment by using two radiation thermometers provided at a measurement part separated from the object to be measured is provided. In the method, two of the radiation thermometers have a rod that is embedded in the measurement part and can receive radiation light from the object to be measured, and an optical fiber connected to the rod; numerical apertures of the radiation thermometers are different; the multiplex-reflection environment is formed between a surface of the measurement part facing the object to be measured and the measurement part; a radiation rate ε of the object to be measured based on a result of a measurement of two of the thermometers and the temperature of the object to be measured is calculated by the following equationsin-line-formulae description="In-line Formulae" end="lead"?α=1−(1−NA·N1)N2/(D1/D2)in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?εeff=(1−α)·ε+α·ε/{1−F·r·(1−ε)}in-line-formulae description="In-line Formulae" end="tail"?wherein D1represents a diameter of the rod of the radiation thermometers, NA represents the numerical aperture, D2represents a distance between the object to be measured and the surface of the measurement part, r represents a reflectivity of the surface of the measurement part, F represents a view factor, α represents a multiplex reflection coefficient, εeffrepresents an effective radiation rate of the object to be measured, and N1and N2are parameters.
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Crowell & Moring LLP
Fulton Christopher W.
Jagan Mirellys
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